M and SM gasoline heads use the same valve numbers. Maybe a small power loss with some M gasoline heads compared to a super. Probably couldn't feel it on most tractors. Really need to know the head number removed and the one being installed. Late M and SM tractors used gasoline heads 8060 DC or 8574 DB. Lower suffix letters came on most M tractors. But lots of heads were replaced over the years. So you can find 8060 DC and 8574 DB on some M tractors now. Can also find 8060 DD and 8574 DC the replacement for previous heads on M and SM tractors. My be just my luck that I seem to find less 8574 DC heads cracked than the others. There was also a newer replacement head number that shows up rarely. You could also use 400 and 450 heads if wanted or found.
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Today's Featured Article - Talk of the Town: What's The "Stuckest" You've Ever Been? - by Edited by Kim Pratt. Another great discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I was about 14 (part of the problem) when I got stuck. I was disking with a cab equipped IH 966. The window was dirty and I was driving into the evening sun. It was hard to see and it was my first pass down the field. I got the tractor so stuck that the underside of the tractor was resting on the ground. My uncle wanted
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